Apple Computer , iMac 20-inch 2.0/2.4 GHz Core 2 Due (T7300,T7700), Order Number, MA876LL/A, Model Number, A1224, Model Year, Mid 2007, Part Name, Video Card ATI Radeon HD 2600XT, Manufacture Part Number, 730-0481 -B, Compatible Apple Order Number, MA877LL/A, MA876LL/A, Compatible Apple Model Number, A1224, EMC Number, EMC 2133, EEE Code, 0JR, 0JS, Z2D, Z5B, Compatible Apple Computer, iMac (20-inch, Mid 2007)
Order you product here: 661-4436 Graphic Card ATI Radeon HD 2600XT for iMac 20-inch Mid 2007 A1224 MA876LL/A, MA877LL/A (730-0481-B), 661-4436
source http://info.applepartsellers.com/661-4436-graphic-card-ati-radeon-hd-2600xt-for-imac-20-inch-mid-2007-a1224-ma876ll-a-ma877ll-a-730-0481-b